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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
This hook occurs 2 times in this file.
Line | Code |
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283 | * (post, comment, term, user, or any other type with an associated meta table). |
284 | * |
285 | * @since 2.9.0 |
286 | * |
287 | * @param int $meta_id ID of updated metadata entry. |
288 | * @param int $object_id ID of the object metadata is for. |
289 | * @param string $meta_key Metadata key. |
290 | * @param mixed $_meta_value Metadata value. Serialized if non-scalar. |
291 | */ |
292 | do_action( "updated_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $_meta_value ); |
293 |
|
294 | if ( 'post' === $meta_type ) { |
295 | /** |
296 | * Fires immediately after updating a post's metadata. |
297 | * |
298 | * @since 2.9.0 |
299 | * |
300 | * @param int $meta_id ID of updated metadata entry. |
301 | * @param int $object_id Post ID. |
Line | Code |
861 | $result = $wpdb->update( $table, $data, $where, '%s', '%d' ); |
862 | if ( ! $result ) { |
863 | return false; |
864 | } |
865 |
|
866 | // Clear the caches. |
867 | wp_cache_delete( $object_id, $meta_type . '_meta' ); |
868 |
|
869 | /** This action is documented in wp-includes/meta.php */ |
870 | do_action( "updated_{$meta_type}_meta", $meta_id, $object_id, $meta_key, $_meta_value ); |
871 |
|
872 | if ( 'post' === $meta_type ) { |
873 | /** This action is documented in wp-includes/meta.php */ |
874 | do_action( 'updated_postmeta', $meta_id, $object_id, $meta_key, $meta_value ); |
875 | } |
876 |
|
877 | return true; |
878 | } |
879 |
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